Core for stereotype-plate-casting boxes



Aug. 28, 1928.

H. A. W. WOOD CORE FOR STEREOTYPE PLATE CASTING BOXES original Filed nec. ze. 1922 yZZEWzJM.

Patented Aug. 28, 1928.,v

UNITED STATES "PATENT-d OFFICE.

HENRY A. WISE WOOD, OF NEW YORK, N. Y.,` ASSIGNOR TO WOOD NEWSPAPER MA- CHINERY CORPORATION, OF NEW YORK, N. Y., A CORPORATION OF VIRGINIA..

CORE FOR STEREOTYPE-PLATE-CASTING BOXES.

Application filed December 26, 1922, Serial No. 609,046. Renewed December 27, 1926.

This invention relates to the `core or casting cylinder used for casting. Vstereotype printing plates, particularly those of curved form. v

The principal object of the invention is to provide a coreof such a character thatthe cooling of the cast stereotype metal will Vbe facilitated thus saving time in completing and ejecting the cast; that the cast itself will have a better surface with fewer indentations upon it than when castagainst an ordinary cast iron core; and that the lead, tin and antimony in the molten metal will not alloy with the metals of the core.

Reference is to be had to the accompanying drawings, in which Fig. l is a side view partly in section of one type of curved stereotype printing plate mold adapted to be employed in connection with this invention; 1

Fig. 2 is a sectional view on the line 2 2 of Fig. l and Fig. 3 is a similar view of another, form of core to whichthis invention can be. ap-

plied.

The invention is shown as applied to the core 10 of a casting boX Ywhich is adapted to cooperate with a back 11. The back can be made of any of the usual types, and as a 0 3 invention is universally applicable to all casting boXes for use in casting stereotype metal or other metal of similar composition, as for example a segmental core 20 shown in Fiof. 3.

It has been found in practice that t-he cast iron back and core of the ordinary molds are slow in conducting the heat away and have to be cooled internally by water if it is desired to produce stereotype plates with any degree of rapidity. Even then it is the cooling of the plates that limits the speed of the machine. As is well known, this proc-,

ess is carried out now with automatic or semi-automatic machines which eject, trim,

and shave the cast plate rapidly,-but in Vwhich the cooling and setting of the cast metals above ment-ioned. But I find also that vvstarted as soon as the cast is cooled and which mat-ter of fact the core can also, and thisl posed so that the core will soon go to pieces, i

This'also 'changes the composition of the cast. ing and makes it harder to machine.

.I find that. I can overcome these several diiiiculties and also produce a much better cast surface on the stereotype plate, one that is smoother, and contains fewer blow-holes and depressions, by making the core of aluminum or an alloy in which aluminum is the chief ingredient. The high conducting powers of i aluminum are well known and this metal, therefore, conducts the heat away from the molten lmetal more rapidly than the other it has an especially agreeable effect upon the stereotype metal in cooling, giving it a better surface against the core, thereby producing a stronger cast because there are fewer de! pressionsthat are caused by bubbles of air or gas in thefmolten metal.

This is useful in connection with all kinds of stereotype metal molds, but particularly valuable in connection with .casting machinery in which the variousk operations are 7 have to wait for that.

In such machines further progress in increasing the output is seriously impeded by the fact that heretofore it has seemed that the vlimit had been reached in reducing the time of cooling. I prefer to cool the core and back just as has been done heretofore so asto get the full benefit of that effect also.

Although .I have illustrated only two S5 forms of the invention and described it as used in `connection only with certain types of stereotype plate molds, I am aware of the fact that it is capable of general use i within the scope of this invention as expressed in the claims. Therefore I do not wish to be limited in these respects, but what I do claim is CIJ Y 1. As an article of manufacture, an alumiuum stereotype plate casting core for increasing the rapidity of cooling the casting.

2. As an article of manufacture, a core for type printing plate casting mold having a a curved stereotype printing plate mold Comhack, and a Core provided with a convex sur- 10 l posed mainly of aluminum. face and formed of a metal Containing a large 3. As an article oi'nianufacture, a stereopercentil 5 type printing plate cast-ing core having ai. In testimony Whereofl have hereunto afalumnum casting surface and consisting of iixecliny signature. aluminum all the Way through.

4. As an article of manufacture, a stereol HEN A. WISE VOD.

ge of aluminum. l 

